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प्रश्न
Find in terms of x the length of the arc that subtends an angle of 30°, at the centre of circle of radius 4 cm.
उत्तर
Length of arc =`theta/360°`× 2𝜋𝑟
Radius = r = 4 cm
𝜃 = angle subtended at centre = 30°
Arc length =`30^@/360^@`× 2 × (7)
=`(2pi)/3`cm
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